Two workers insulate the house for five days. After the first day of working together, only one worker continue to cover the house. How many days will the house be insulated if every worker has the same work tempo?

Correct answer:

x =  9 d

Step-by-step explanation:

2·1 + 1·(x-1) = 2·5

x = 9

x = 9/1 = 9

x = 9

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